Malicious PDF — malware analysis report

Static analysis result for SHA-256 12454c49efc80e7f…

MALICIOUS

PDF

88.2 KB Created: 2021-03-08 15:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5d198056a7f0c86f81b4b5ab2cf331d5 SHA-1: 5004f639bb470de67d999e29059a0a61c09a7f9a SHA-256: 12454c49efc80e7f691f9a7098c6584d9e1ac29c37aec5a184482ec9ce94b2b5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a phishing lure, embedding a large number of external links, many of which point to disposable or suspicious domains. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's structure suggests it's designed to act as a link farm, potentially redirecting users to malicious content or further download stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://soxebez.ru/award?keyword=pdf+candy+desktop+pro+2.+53+review PDF link annotation
    • https://sigurapefudaji.weebly.com/uploads/1/3/4/5/134576843/7274405.pdfIn PDF document text
    • https://dojunulopifo.weebly.com/uploads/1/3/4/4/134445836/2287395.pdfIn PDF document text
    • http://fruitslope.online/todukiszs76.pdfIn PDF document text
    • https://xajevopo.weebly.com/uploads/1/3/2/6/132682124/jetutozaji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368740/normal_5fe5d240af5e3.pdfIn PDF document text
    • http://phrensy.co/estudios_biblicos_para_nios1k7i3.pdfIn PDF document text
    • http://vojituvidur.iblogger.org/23577756911.pdfIn PDF document text
    • https://fadefewili.weebly.com/uploads/1/3/4/3/134316521/gedov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497358/normal_6030208dd37c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416150/normal_5ff459c039dc3.pdfIn PDF document text
    • http://eliyalte.com/causes_of_vietnam_war_worksheet4uwrr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368468/normal_5fdd4a3c0d44e.pdfIn PDF document text
    • http://instacopyrightcenter.com/711259927548n7ny.pdfIn PDF document text
    • http://reduslim-ufficialesito.site/96795417222dzde.pdfIn PDF document text
    • https://vidafipi.weebly.com/uploads/1/3/1/6/131636743/a9c1935c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464871/normal_5fd82983d8d71.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/7071820.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://razikonuwivomo.epizy.com/free_bollywood_movies_sites_for_mobile.pdfIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_de236bbe2e0640d7816b3866e18aefdc.pdf?index=trueIn PDF document text
    • https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_44a349d6e07f447797c2821f40aec506.pdf?index=trueIn PDF document text
    • http://didoruvevesipug.rf.gd/livelessons_bash_scripting_fundamentals__advanced.pdfIn PDF document text
    • http://fikenojidukozo.rf.gd/4379077990.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012bf8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12BF8 22604 bytes
SHA-256: 673150b7ecddb9933849953aff4106df75a3561ff2eabd5eab46a71251fa4288
font_00_sfnt_off0000f329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 5888 bytes
SHA-256: 4d66a9fb88ccf6759c232fb679cf8583aa0c43a3023d8646c1d16be3f3fc295a
font_01_sfnt_off00010773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10773 10692 bytes
SHA-256: 59f3081cab57cfee0ef63c30f89f0f814f03eca592e8ca2674fec05845ce4dc4